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Use when code introduces an extra variable mutation (e.g., K-=1) before using the value as an array index, creating additional symbolic state updates
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Basé sur la classification professionnelle SOC
Use when printf statements output strings without trailing newlines
Use when array is accessed with direct user input as index (0-based indexing)
Use when the program accesses a precomputed table using an offset (e.g., arr[n-1]) that introduces an arithmetic operation between the symbolic input and the index
Use when loop variables iterate over character values (e.g., ASCII codes) to represent different operations or choices
Use when code uses a loop to search for an input value in an array and then uses the found index for further computation
Use when code reads a fixed number of characters into an array and only accesses individual elements
| name | avoid-redundant-intermediate-assignments |
| description | Use when code introduces an extra variable mutation (e.g., K-=1) before using the value as an array index, creating additional symbolic state updates |
A KLEE-coverage code transformation. Applying it rewrites C source so symbolic execution explores more of the program's behavior.
When code introduces an extra variable mutation (e.g., K-=1) before using the value as an array index, creating additional symbolic state updates
Inline the arithmetic directly into the index expression (e.g., s[k-1] += 32) instead of pre-decrementing the variable on a separate statement
Inlining reduces the number of symbolic store operations and intermediate constraints KLEE must track, simplifying the path conditions and enabling faster constraint solving and broader exploration
Before:
#include<stdio.h>
int main(void)
{
int N,K;
char s[55];
scanf("%d %d",&N,&K);
scanf("%s",&s);
K-=1;
s[K]+=32;
printf("%s\n",s);
return 0;
}
After:
#include <stdio.h>
int main (){
int n,k;
char s[60] ;
scanf("%d %d",&n ,&k);
scanf("%s",&s);
s[k-1] += 32;
printf("%s",s);
return 0;
}
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